<?php //$Id: restore.php,v 1.44.2.4 2008/12/11 04:37:11 dongsheng Exp $
	//This script is used to configure and execute the restore proccess.

	//Define some globals for all the script

	//Units used
	require_once("../config.php");
	require_once("../lib/xmlize.php");
	require_once("../course/lib.php");
	require_once("lib.php");
	require_once("restorelib.php");
	require_once("bb/restore_bb.php");
	require_once("$CFG->libdir/blocklib.php");
	require_once("$CFG->libdir/wiki_to_markdown.php" );
	require_once("$CFG->libdir/adminlib.php");

	//Optional
	$id = optional_param( 'id' );
	$file = optional_param( 'file' );
	$cancel = optional_param( 'cancel' );
	$launch = optional_param( 'launch' );
	$to = optional_param( 'to' );
	$method = optional_param( 'method' );
	$backup_unique_code = optional_param('backup_unique_code',0,PARAM_INT);

	//Get and check course
	if (! $course = get_record("course", "id", $id)) {
		error("Course ID was incorrect (can't find it)");
	}
	// To some reasons, course_startdateoffset value was lost during restoring
	// See MDL-17469
	if (!empty($course->startdate) && !empty($SESSION->course_header->course_startdate)) {
		$SESSION->restore->course_startdateoffset = $course->startdate - $SESSION->course_header->course_startdate;
	} else {
		$SESSION->restore->course_startdateoffset = 0;
	}

	//Check login
	require_login();

/// With method=manual, we come from the FileManager so we delete all the backup/restore/import session structures
	if ($method == 'manual') {
		if (isset($SESSION->course_header)) {
			unset ($SESSION->course_header);
		}
		if (isset($SESSION->info)) {
			unset ($SESSION->info);
		}
		if (isset($SESSION->backupprefs)) {
			unset ($SESSION->backupprefs);
		}
		if (isset($SESSION->restore)) {
			unset ($SESSION->restore);
		}
		if (isset($SESSION->import_preferences)) {
			unset ($SESSION->import_preferences);
		}
	}

	if (!$to && isset($SESSION->restore->restoreto) && isset($SESSION->restore->importing) && isset($SESSION->restore->course_id)) {
		$to = $SESSION->restore->course_id;
	}

	if (!empty($id)) {
		require_login($id);
		if (!has_capability('moodle/site:restore', get_context_instance(CONTEXT_COURSE, $id))) {
			if (empty($to)) {
				error("You need to be a teacher or admin user to use this page.", "$CFG->wwwroot/login/index.php");
			} else {
				if (!has_capability('moodle/site:restore', get_context_instance(CONTEXT_COURSE, $to))
					&& !has_capability('moodle/site:import',  get_context_instance(CONTEXT_COURSE, $to))) {
					error("You need to be a teacher or admin user to use this page.", "$CFG->wwwroot/login/index.php");
				}
			}
		}
	} else {
		if (!has_capability('moodle/site:restore', get_context_instance(CONTEXT_SYSTEM))) {
			error("You need to be an admin user to use this page.", "$CFG->wwwroot/login/index.php");
		}
	}

	//Check site
	if (!$site = get_site()) {
		error("Site not found!");
	}

	//Check necessary functions exists. Thanks to gregb@crowncollege.edu
	backup_required_functions();

	//Check backup_version
	if ($file) {
		$linkto = "restore.php?id=".$id."&amp;file=".$file;
	} else {
		$linkto = "restore.php";
	}
	upgrade_backup_db($linkto);

	//Get strings
	if (empty($to)) {
		$strcourserestore = get_string("courserestore");
	} else {
		$strcourserestore = get_string("importdata");
	}
	$stradministration = get_string("administration");

	//If no file has been selected from the FileManager, inform and end
	$navlinks = array();
	$navlinks[] = array('name' => $stradministration, 'link' => "$CFG->wwwroot/$CFG->admin/index.php", 'type' => 'misc');
	$navlinks[] = array('name' => $strcourserestore, 'link' => null, 'type' => 'misc');
	$navigation = build_navigation($navlinks);

	if (!$file) {
		print_header("$site->shortname: $strcourserestore", $site->fullname, $navigation);
		print_heading(get_string("nofilesselected"));
		print_continue("$CFG->wwwroot/$CFG->admin/index.php");
		print_footer();
		exit;
	}

	//If cancel has been selected, inform and end
	if ($cancel) {
		print_header("$site->shortname: $strcourserestore", $site->fullname, $navigation);
		print_heading(get_string("restorecancelled"));
		print_continue("$CFG->wwwroot/course/view.php?id=".$id);
		print_footer();
		exit;
	}

	//We are here, so me have a file.

	//Print header
	if (has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) {
		$navlinks[] = array('name' => basename($file), 'link' => null, 'type' => 'misc');
		$navigation = build_navigation($navlinks);

		print_header("$site->shortname: $strcourserestore", $site->fullname, $navigation);
	} else {
		$navlinks = array();
		$navlinks[] = array('name' => $course->shortname, 'link' => "$CFG->wwwroot/course/view.php?id=$course->id", 'type' => 'misc');
		$navlinks[] = array('name' => $strcourserestore, 'link' => null, 'type' => 'misc');
		$navigation = build_navigation($navlinks);
		print_header("$course->shortname: $strcourserestore", $course->fullname, $navigation);
	}
	//Print form
	print_heading("$strcourserestore".((empty($to) ? ': '.basename($file) : '')));
	print_simple_box_start('center');

	//Adjust some php variables to the execution of this script
	@ini_set("max_execution_time","3000");
	raise_memory_limit("192M");

	//Call the form, depending the step we are

	if (!$launch) {
		include_once("restore_precheck.html");
	} else if ($launch == "form") {
		if (!empty($SESSION->restore->importing)) {
			// set up all the config stuff and skip asking the user about it.
			restore_setup_for_check($SESSION->restore,$backup_unique_code);
			include_once("restore_execute.html");
		} else {
			include_once("restore_form.html");
		}
	} else if ($launch == "check") {
		include_once("restore_check.html");
		//To avoid multiple restore executions...
		$SESSION->cancontinue = true;
	} else if ($launch == "execute") {
		//Prevent multiple restore executions...
		if (empty($SESSION->cancontinue)) {
			error("Multiple restore execution not allowed!");
		}
		//Unset this for the future
		unset($SESSION->cancontinue);
		include_once("restore_execute.html");
	}
	print_simple_box_end();

	//Print footer
	print_footer();

?>
